Abstract:
The present invention is directed to thermophilic gram-positive anaerobic host cells. The thermophilic gram-positive anaerobic host cells of the invention, for example Themoanaerobacterium sachharolyticum (" T. sacch "), express heterologous biomass degrading enzymes, such as cellulases, and are able to produce useful fermentation products from cellulose. Useful fermentation products include, for example, ethanol, acetic acid, lactic acid or CO 2 . In order to provide maximum expression and activity levels, biomass degrading enzymes can be expressed from codon-optimized nucleotide sequences, can be expressed under the control of a high-efficiency promoter, and/or can be fused to a signal peptide. In addition, the host cell, for example, a T. sacch host cell, can be genetically altered to further improve ethanol production, for example by disrupting the production of organic products other than ethanol.
Abstract:
Thermophilic gram-positive anaerobic host cells, for example Themoanaerobacterium sachharolyticum ("T sacch"), express heterologous biomass degrading enzymes, such as cellulases, and are able to produce useful fermentation products from cellulose. Useful fermentation products include, for example, ethanol, acetic acid, lactic acid or CO2. In order to provide maximum expression and activity levels, biomass degrading enzymes can be expressed from codon-optimized nucleotide sequences, can be expressed under the control of a high-efficiency promoter, and/or can be fused to a signal peptide. In addition, the host cell, for example, a T sacch host cell, can be genetically altered to further improve ethanol production, for example by disrupting the production of organic products other than ethanol.
Abstract:
The present invention is directed to a replicative, thermostable plasmid. In particular, the present invention is directed to a replicative, thermostable plasmid comprising a sequence derived from the pB6A plasmid and at least one functional unit comprising a sequence that is not found in plasmid pB6A.
Abstract:
Thermophilic gram-positive anaerobic host cells, for example Themoanaerobactenum sachharolyticum ("T sacch"), express heterologous biomass degrading enzymes, such as cellulases, and are able to produce useful fermentation products from cellulose Useful fermentation products include, for example, ethanol, acetic acid, lactic acid or CO2 In order to provide maximum expression and activity levels, biomass degrading enzymes can be expressed from codon-optimized nucleotide sequences, can be expressed under the control of a high-efficiency promoter, and/or can be fused to a signal peptide In addition, the host cell, for example, a T sacch. host cell, can be genetically altered to further improve ethanol production, for example by disrupting the production of organic products other than ethanol